Home Stretch

Colour Restore is coming to an end in 3 days.
Last chance to submit your entry.
I notice a lot of people partially through, so keep puzzling!
If you’re stuck or have any questions – you can email to roygbivpuzzles(at)gmail(dot)com

Nikoli Hurdles 5 [Live Updates]

[01 Dec] Nikoli Hurdles 5 has started!
Any updates or errata will be mentioned here.

– Password for Puzzle 4 had a minor typo. It is now fixed. Sorry!

[02 Dec] Puzzle 8 has been updated. The original one had multiple solutions. Please reload the page for the new version.

Welcome!

What do crosswords in your newspaper, that numbered 9x9 grid that’s suddenly everywhere, the spot the differences on a cereal box, a chess position from some tournament match, the squiggles you see in common IQ tests and a high school mathematics exam have in common?

Answer: They can all be classified as a “puzzle”.
As a lifelong puzzler, I always find the word “puzzle” to be a bit broad. Everyone has their own definition of a puzzle. I imagine a certain place where all puzzle types gather and made known to everyone. That place would be Somewhere Over the Rainbow.